Fix tab completion for plugins / reload command

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/command/defaults/PluginsCommand.java

@@ -1,6 +1,8 @@
 package org.bukkit.command.defaults;
 
 import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
@@ -24,6 +26,11 @@ public class PluginsCommand extends BukkitCommand {
         return true;
     }
 
+    @Override
+    public List<String> tabComplete(CommandSender sender, String alias, String[] args) throws IllegalArgumentException {
+        return Collections.emptyList();
+    }
+
     private String getPluginList() {
         StringBuilder pluginList = new StringBuilder();
         Plugin[] plugins = Bukkit.getPluginManager().getPlugins();

paper-api/src/main/java/org/bukkit/command/defaults/ReloadCommand.java

@@ -1,6 +1,8 @@
 package org.bukkit.command.defaults;
 
 import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
@@ -27,4 +29,9 @@ public class ReloadCommand extends BukkitCommand {
 
         return true;
     }
+
+    @Override
+    public List<String> tabComplete(CommandSender sender, String alias, String[] args) throws IllegalArgumentException {
+        return Collections.emptyList();
+    }
 }